GLHUI: Open OpenGL context windows in X11 with libX11

Haskell functions to open and manage a OpenGL window with libX11.

This module is intended to be imported qualified, to avoid clashes with Prelude functions, e.g.

import qualified Graphics.UI.GLWindow as Window

As an example, here is a simple module that uses some of these functions to open a OpenGL 3.2 Context:

module Main where

import Graphics.Rendering.OpenGL
import qualified Graphics.UI.GLWindow as Window

myLoop = do clear [ColorBuffer]
            t <- Window.time
            clearColor $= Color4 (sin (realToFrac t) * 0.5 + 0.5)
                                 (sin (realToFrac (t+1)) * 0.5 + 0.5)
                                 (sin (realToFrac (t+2)) * 0.5 +0.5)
                                 0

main = do Window.init 3 2 -- initializes a OpenGL 3.2 context
          Window.loop myLoop -- stops when the ESC key is pressed
          Window.kill -- removes the window when the loop stops

Special thanks to Tiago Farto (aka xernobyl) for coding the C version of these functions

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